Improvement in safety-caps poft cans



H. 0. ALEXANDER SAFETY GAP FOR (BANS;

' N0..104.402. Patented June 2-1 1.870;

Jag imam: as;

top of the said-cant HORACE omr ron ALEXANDER, or NEW YORK,1N.'Y.

Letters Patent No; 104,402, dated June .21, 1870.

IMPROVEMENT IN SAFETY- CAPS IOK CANS.

The Schedule referred to in these Letters Patent and making part of thesame.

the following is a full, clear, and exact description thereof, whichwill enable others skilled in the art to make and use the same,reference being had to the accompanying drawing forming part of thisspecificationw Figure 1 is a top view of my improved can-cap. Figure. 21s a top View of aQmodified. form of the a same.

Figure 3 is a vertical cross-section of the same,

taken through the line a; x, fig. 2. v 4 Sfignilarletters of referenceindicate corresponding par v f My invention hasfor its object to furnishan improved safety-cap for cans, which shall be simple in construction,efl'ective in operation, and convenient in f; r

' E orpart B, to rest upon the edge of the lower part The upper part ofthe sides use and It consists in the can-cap constructed as hereinaftermore may described. l A is the lower part of the cap,.the base flange ofwhich is designed to be securely soldered to the top of the can,directly-aver the orifice or opening in the said The part A is made of adisk of metal, in the center of which is spun or struckup, a tubularsocket','--the sides of which may be made straight or tapering.

a are the fastenings, which may be formed by slit- -ting the edges ofthe flange of the base part A, and turning the parts between the slitsup, as shown in a the drawing, to form the said lips, loops, or catches,

or small segments may be cut from the opposite edges of the flange ofthe base part A, to form a' straight edge, and the parts along which thestraight edges Z me this 10th day of February, 1870.-

have been formed may be turned up to form long lips, loops, or catchesa, as shown in fig.'2.

The top of the part A is grooved around the edge, as shown in fig; 3, toserve as a guide to the knife when opening the can."

' B. is the upper part or top of the cup, which is formed by spinning orstriking up the central part of a circular'disk, to form atnbular socketto fit upon the projecting part of theipart A. The diameter of thebaseflange of the upper partB is such that it may fit into the bends of thelips, loops, or catchesa' of the partA. The outer edge ofthe base flangeof the part}; notched when the catches a are formed by slittihgthe baseflange of the part A, or trimmed ed to a straight edge when the catchesa, are made long, shown in fig. 2, to'allow it to be passed down overthe "said; ears, catches, or fastenings a/J Bythis construe:

tioirby turning the upper part B partly around, when it has been presseddown-to its place upon thepart A, the nnnotched or untrimmed part of thebase flange oi the par't'B will pass into the bends of the catches a, asshown in figs. 1, 2, and 3, and securely fasten the part B to the partA;

' A thin disk, 0, of cork, rubber, or other suitable material may beinserted in the upper part of the 02:2

to. guard against leakage. of the top part Bmaybe slightly grooved, asshown in fig. 3, to receive and retain the edge of the disk 0, to keepthe said disk in place when the part B is detached from the lower. partA.

Having thus described my invention,

I claim as new and desire to. secure by Letters Patent- K A fasteningdevice for. cans, formed of two sheetlnetal disks upset and shaped toform caps, the one fitting over the' other, the .flanges of the innerbeing turned over at two pqints to form lips aand the flange of theontercut away at corresponding points to per1 mit its entrance under the lipsand theinterlocking of the two, as shownand described.

' The above specification of my invention signed by HORACE CLIFTONALEXANDER. Witnesses:

Geo. W. MABEE, JAMES T. GRAHAM.

